In the core series games
Generation I
In Generation I, TMs can only be used once.
Generation II
In Generation II, TMs can only be used once.
Generation III
In Generation III, TMs can only be used once.
Generation IV
In Generation IV, TMs can only be used once. TMs cannot be used in Pokémon Battle Revolution, but they can be transferred to a Generation IV DS game via Mystery Gift.
Generation V
In Generation V, TMs can be used any number of times.
Generation VI
In Generation VI, TMs can be used any number of times.
Generation VII
In Generation VII, TMs can be used any number of times.
Generation VIII
In Pokémon Sword and Shield, TMs can be used any number of times.
In Pokémon Brilliant Diamond and Shining Pearl, TMs can only be used once.
Generation IX
In Generation IX, TMs can only be used once.
In the spin-off games
Pokémon Mystery Dungeon series
TMs in the Mystery Dungeon series are named only by the move they teach. For example, Attract is the item that teaches the move Attract. Most TMs, however, correspond to a TM in the core series' contemporaneous games.
TMs in Red Rescue Team and Blue Rescue Team and in Explorers of Time, Darkness, and Sky, TMs can only be used once before becoming Used TMs. In Gates to Infinity, TMs can be used any number of times. In Pokémon Super Mystery Dungeon, some TMs can only be used once while rainbow-colored TMs can be used any number of times.
In Rescue Team DX, TMs can only be used once. Whilst the available TMs are the same as those in Pokémon Sun and Moon, the TM list order is the same as for Super Mystery Dungeon (that is, in the TM order for Pokémon Omega Ruby and Alpha Sapphire), with newly added TMs added to the end of the list.
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Location
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Purchase price
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Sell price
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MDRB
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Magma Cavern*, Sky Tower, Howling Forest, Stormy Sea, Silver Trench, Fiery Field, Lightning Field, Northwind Field, Northern Range, Pitfall Valley, Buried Relic, Wish Cave, Desert Region, Southern Cavern, Wyvern Hill, Solar Cave, Darknight Relic, Grand Sea, Joyous Tower, Far-Off Sea, Purity Forest Kecleon Shop (Joyous Tower, Purity Forest) Monster Houses (all) Buried items (Buried Relic, Darknight Relic, Remains Island) Job rewards (B-★)
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6500
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1500
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MDT
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Trade, A-OK Mail, Wonder Mail, Friend Rescue
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6500
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250
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MDDS
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Final Maze Kecleon Shops (Mystifying ForestD*, Mt. TravailD, Concealed Ruins, Mystery Jungle, Lake Afar*, Happy OutlookD*, Mt. MistralD*, Shimmer HillD*, Midnight ForestD*, Destiny TowerS) Treasure Town Kecleon Wares (after graduating) Hidden Stairs (Lake Afar, Treacherous Waters, Southeastern Islands, Inferno Cave)S Spinda's Café (Gold Ticket big win; Prism Ticket win)S Sometimes received as a reward from Numel found on Sky Peak Mountain PathS
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6500
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250
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MDBSL
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?
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N/A
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N/A
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MDGtI
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?
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N/A
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N/A
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SMD
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Kecleon Shops
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1474
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148
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MDRTDX
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Various dungeons (including: Mt. Thunder, Lapis Cave, Frosty Forest, Joyous Tower, Purity Forest) Monster Houses (Purity Forest) Kecleon Shop (Joyous Tower, Purity Forest) Kecleon Wares (Pokémon Square) Treasure Boxes
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1950
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390
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